Liquid-fuel cookstove



Nov; 4, 1930. L. D. FQRTIER LIQUID FUEL COOK STOVE Filed April 27, 1928 2 Sheets-Sheet l Nov. 4, 1930. D. :F'ORTIER 1,780,421

LIQUID FUEL COOK STOVE Filed April 27, 1928 2 Sheets-Sheet 2 IIIIIIIIIIIII" mul in llllll P 4 3 50M 5 157 I Qijs.

Patented Nov. 4, 1930 UNITED STATES PATENT orncr.

LEON D. FOR'IIER, OF KANKAKEE, ILLINOIS, .A SSIGNOR TO SEARS ROEIBUGK AND GO. 1 OI CHICAGO, ILLINOIS, A CORPORATION NEW YORK LIQUID-FUEL cooxs'rovr:

Application filed April 27,1928. Serial No. 273,218.

The invention relates generally to cook stoves and more particularly to liquid fuel cook stoves embodying a generating apparatus for converting liquid fuel supplied thereto under pressure into a combustible gaseous vapor.

The object of the invention is to provide an improved means for generating the liquid fuel into a gas, including a generating burner capable of operating independently in the generation of gas to be supplied to other burners.

Another object is to provide a generating burner which serves both in the initial or pregeneration of the fuel, and in the subsequent generationfor the continued operation of the stove. I y

In the drawings:

Fig.1 is aplan View of the top of a cook stove embodying the invention, parts thereof being broken away to afford a better illustration of the generating device.

Fig. 2 is a longitudinal elevational section taken through the generating device.

Fig; 3 is a sectional view taken on the line 3-3 of Fig.2 looking in the direction of the arrows.

Fig. 4 is a rear elevational view-of the device.

Fig. 5 is a sectional view of a detail of construction taken on the line 5-.5 of Fig. 2.

Referring to Fig. 1, the top 6 of a suitable cook stove is shown as having three burner openings 7 therein each adapted to receive and support therein a grid or spider 8 of any well known construction. At one side of the stove is mounted a pressure tank 9 which contains the supply of liquid fuel. A pump 10 is mounted on the stove and is suitably connected through the valve controlled pipe line 11 with the pressure tank 9 for the purpose of creating or building up an operating pressure within the tank. A suitable pressure gage 12 is generally provided to indicate the pressure within the tank.

In the present instance, three burners 13, 14 and 15 are shown being arranged in spaced relation longitudinally of the stove top, each beneath a grid 8. Each of these burners is in valve-controlled communication with a manifold 16.

The intermediate burner 18 has associated therewith means for generating the fuel into a gas for delivery to the manifold. Such means preferably comprises an elongated tube 17 to which the liquid fuel under pressure is delivered by a small pipe 18 controlled by a valve 18. The tube 17 is arranged to be heated during the operation of the device.

by a burner 19 positioned immediately beneath the tube and arranged to burn fuel gas prfiyiously generated by the heating of the tu In this embodiment, the tube 17 is supported in the front side 20 of the stove frame and extends rearwardly across the central burner opening in the top of the stove. The rear end of the tube has a nozzle 21 controlled by a needle valve 22, and an operating rod 23 for said needle valve extends through the tube and is equipped with an operating handle 24 in a well known manner.

Suitable means for conveying the gaseous fuel from the generator tube to the manifold is provided which, as shown herein, is in the form of a hollow U-shaped member 25 connected at its lower end to the manifold and having its upper end arranged in axial alinement with the generator tube 17. Preferably, the upper end of the member 25 is closed by a downwardly extending wall 26 (Fig. 2) through which the rear end of the tube projects. As may be seen in Fig. 5, the sides 27 of the member adjacent the wall 26 flare outwardlyand form a passageway for the admission of air. The size of the opening may, if desired, be regulated by such means as a plate 28. carried by one of the flared sides and extending across the passageway toward the other side.

In the present embodiment, the generating burner 19 is disposed between two side burners 29 and 30 but is separately supplied from the fuel gas manifold so that when the generating device is in operation, a constant supply of fuel gas passes to the burner for heating the generating tube. Thus referring to Figs. 2' and 3, I provide a burner head in the form of a hollow casting shaped to provide the generating burner 19 and the side burners 29 and 30, each burner being elongated in form and having a plurality of slits 31 extending transversely across the upper surface thereof. The burner casting has a lower central transverse portion with two annular flanges and 33 spaced apart and formingtwo chambers 34 and 35 respectively communicating with the intermediate generating burner 19 and the. two side burners 29 and 30. Gas is delivered from 'the'manifold' to the two annular chambers 34 and 35, by a distributor 36 interposed between the manifold and the burner head. i I

The distributor 36 is in the form of a separate casting Substantially L-shaped inform, one end being connected to the manifold and the other end fitting into the outer flange 32 depending from the burner head. 'VVithin the casting is an upright partition or wall 37, and from this wall extends an angular inner duct 38, one end of which opens toward the manifold and the other endof which fits into the inner flange 33 of the burner head.

Thus the intermediate or generating burner is in constant communication with the manifold. The other two burners communicate *ith the manifold through an opening 39 in the wall 37, which opening is controlled by a valve 40 having an operating stem 41 projecting through a nut 41 in the forward wall of the distributor casting.

In addition to its function as a main generator burner, the burner 19 also serves as a pregenerator burner. To this end I initially supply to said burner the gasoline vapor which is present in the upper part of the pressure tank. As may be seen clearly in Figs. 1 and 2, the means for supplying such vapor to the burner comprises a. nozzle 42 mounted in the rear wall of the distributor so that vapor passing under pressure through the nozzle is discharged into the lower rear end of the duct 38, which leads to the central burner 19. A pipe 43 connects the nozzle with the stem of the pressure gage12 provided upon the supply tank 9, which tube is controlled by means of a suitable valve 44 preferably provided in the tube adjacent the pressure gage.

In the present construction, the manifold is supported longitudinally of the stove by means of a channel bar 45 (Fig. 3) rigidly secured to the stove. A V-shaped trap 46 is provided at an appropriate point in the manifold, equipped with a drain nipple 47 passing through the channel bar and having a removable plug 48.

The operation of the device is exceedingly simple. Assuming that the stove is entirely shut off, and that suflicient operative pressure has been created in the pressure supply tank, in order to start the stove, the valve 18 is opened to admit liquid fuel to the generator tube. Then the valve 44 is opened permitting vapor to flow from the upper part of the supply tank through the pipe line 43, and the nozzle 42, to the central burner 19, where it may be readily ignited. This operation is continued until the generator tube 17 and the liquid fuel therein has been sufficiently heated to produce a gaseous condition of the fuel. The needle valve 21 at the end of the generator tube is now opened to permit the discharge of the gaseous fuel into the member 25 leading to the manifold. The discharge of the gaseous fuel into the mem ber causes 'air to be drawn through the air passage to form a combustible gaseous mixture which passes to the manifold. Inasmuch as the central burner section 19 is in direct communication with the manifold, the vapor will supplant the vapor from the nozzle 42 which may then be turned off without interfering with the generating operation. When desired, the two side burners 29 and 30 may be supplied with fuel from the manifold by opening the valve 40 in the distributor. The fuel gas flowing to the two outer burner sections will be ignited from the flame of the central burner section. To operate the other burners 14 and 15 of the stove it is only necessary to operate their respective control valves to effect the supply of gas thereto. These burners may be of any suitable construction. Herein they are shown as being formed in three sections all interconnected so as to communicate withthe manifold under the control of a valve; If desired, an oven burner (not shown) may also be connected to the'manifold, and it will be apparent that since the generating burner 19 is capable of being operated independently, it is especially adapted to supply heat for generating purposes when only the oven burner is in use.

I claim as my'invention:

1. A liquid fuel stove comprising, in combination, a generator tube adapted for connection with a source of fuel under pressure, a manifold, a burner head comprising a generator burner disposed beneath said tube, and-a pair of cooking burners on opposite sides-of the generator burner and disposed in substantially the same plane, a tubular member into which said generator tube is adapted to discharge connected with said manifold, a distributor beneath said head having a valve-controlled passage connecting the manifold with the two cooking burners, a second passage in the dlstributor constantly connecting the generator burner with the manifold, and valve-controlled means connected with the source of fuel under pressure to discharge fuel vapor into said second passage.

2. A liquid fuel stove comprising, in combination, a generator tube adapted for connection with a source of fuel under pressure, a burner head comprising a generator burnerdisposed beneath said tube and a pair of cooking burners on opposite sides of the generator burner, means providing two concentric chambers one communicating with the generator burner and the other communicating with the two cooking burners, a distributor having a valve-controlled passage connected with the chamber communicating with the cooking burners, and a second passage connected with the chamber communicating with the generating burner, and means for delivering gaseous fuel from the generator tube to said two passages.

3. A liquid fuel stove having, in combination, an elongated generator member adapted for connection with a source of fuel under generator member, and valve means for controlling the flow of fuel from the last mentioned passage to the other passage.

In testimony whereof, I have hereunto affixed my signature.

' LEON D. FORTIER.

pressure, an integrally cast burner structure comprising a central burner mounted directly beneath said generator member and two side burners disposed substantially in the same plane as the central burner, a separately cast member having a first passage communicating with said central burner and a second passage formed around said first passage and communicating with the two side burners, means adapted to receive the discharge of fuel from said generator member and constantly communicating with said first passage, and valve means for controlling the flow of fuel at will from the first passage to the second passage.

4. A liquid fuel stove comprising a generating member, a burner structure having two burners disposed substantially in the same horizontal plane with one of said burners directly beneath said generator member, a hollow connecting member into which said generator member is adapted to discharge, and a distributor interposed between said hollow member and said burner structure, said distributor comprising a hollow angular member communicating with said connecting member and having a partition wall dividing the angular member into two passages, one providing constant communication between the generator burner and said connecting member, and the other leading to the other one of said burners, said partition wall having an opening therein, and a valve member controlling said opening.

'5. A liquid fuel stove comprising a hollow generator member, a burner structure comprising a central generator side burners with two concentric chambers one of which communicates with the central burner and the other one of which communicates with and connects the two side burners, said burner structure having depending annular fianges forming said two chambers, means for delivering fuel to said burner chambers comprising a distributor having inner and outer wall portions adapted to interfit with said flanges and forming passages communicating respectively with the two burner chambers, a hollow member connecting one of said passages with the burner and two 7 

